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Ada County, ID Parcels & GIS Data

Ada County, ID parcel data: 222,590 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Ada County, Idaho parcel data covering 222,590 property records.

This page documents parcel-level coverage for Ada County, Idaho. Each parcel record carries its boundary polygon (GIS geometry) along with attributes such as the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and most recent sale price and date. Exact fill rates for Ada County are listed in the attribute-coverage table below. Preview the data in the interactive explorer, or download the complete Ada County property dataset.

Ada County is located in the southwestern part of Idaho, United States. As of the 2020 census, the county had a population of 494,967, which by 2025 was estimated to have risen to 546,141. Ada County is by far the state's most populous county; it is home to 26.8% of the state's population. The county seat and largest city is Boise, which is also the state capital.

FIPS 16001

Official county website: https://adacounty.id.gov/developmentservices/building-division/

The FIPS code for Ada County is 16001.

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Attribute coverage

Ada County contains 222,590 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL). For the LBCS columns, only real classifications count: the to-be-determined and not-applicable placeholder codes are excluded.

ColumnCoverageRecords populated
lrid100%222,590
parcelid100%222,581
parcelid297.4%216,745
ogparcelid100%222,590
ogparcelid297.4%216,733
parentid<0.1%0
stackid<0.1%0
geoid100%222,590
statefp100%222,590
countyfp100%222,590
countyname100%222,590
cousubfp100%222,590
cousubname100%222,590
tractce100%222,590
tractname100%222,590
taxacctnum<0.1%0
taxyear100%222,590
taxdistrict98.1%218,437
usecode<0.1%2
usedesc98.2%218,574
zoningcode99.9%222,469
zoningdesc99.9%222,469
numbldgs96.8%215,552
numunits88.0%195,962
yearbuilt<0.1%0
numfloors63.0%140,268
bldgsqft<0.1%0
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue88.4%196,731
landvalue88.4%196,739
agvalue88.4%196,739
totalvalue97.3%216,583
taxacres98.2%218,676
calcarea100%222,590
saleamt<0.1%0
saledate<0.1%0
ownertype49.9%111,015
ownername49.9%111,015
owneraddr92.6%206,117
ownercity<0.1%19
ownerstate<0.1%19
ownerzip<0.1%19
parceladdr98.2%218,491
parcelcity<0.1%22
parcelstate100%222,590
parcelzip99.8%222,147
legaldesc98.2%218,555
township100%222,523
section100%222,523
qtrsection100%222,523
range100%222,523
plssdesc100%222,523
book<0.1%0
page<0.1%0
block<0.1%0
lot<0.1%0
parceltype0.8%1,868
accesstype0.8%1,874
iucnclass0.6%1,234
placename4.5%9,977
placetype4.4%9,900
firmid99.9%222,462
firmdate99.9%222,462
fldzone99.9%222,462
zonesubty97.4%216,866
staticbfe<0.1%10
elevmin0.5%1,131
elevmax0.5%1,131
elevavg0.5%1,131
fireplaces<0.1%0
heating<0.1%0
heatfuel<0.1%0
cooling<0.1%0
foundation<0.1%0
roofcover<0.1%0
siding<0.1%0
bldgtype<0.1%0
naicscode4.5%10,100
frsid<0.1%1
dfrurl<0.1%1
caapermit<0.1%1
cwapermit<0.1%1
rcrapermit<0.1%1
updated100%222,503
centroidx100%222,590
centroidy100%222,590
surfpointx100%222,590
surfpointy100%222,590
geom100%222,590
extras100%222,590
ownerlist38.2%85,000
placefp88.1%196,163
zoningurl55.1%122,654
lbcsactivity98.6%219,400
lbcsfunction91.0%202,464
lbcstype98.6%219,415
lbcscharacter99.0%220,320
lbcsownership50.7%112,834
sourceurl97.4%216,732

Schema mapping

How source columns from the acquired Ada County GIS layers map into the harmonized entity schemas and assemble into the published parcel table, alongside supplemented fields (elevation, flood zone) and deterministic columns.

Schema mapping — Ada County, Idaho (16001) 2 entities · most recent acquisition per entity · generated 2026-10-10 direct column transformed (expression) geometry extras json supplemented determined ALL ENTITIES → FINAL PARCEL SCHEMA Harmonized entity columns assemble into publish.parcel_layer — matched by column name. Supplemented fields show their fill rate in this county. SOURCE COLUMNS HARMONIZED ENTITIES PUBLISH.PARCEL_LAYER PARCEL pin owner geom 1 cols ⇢ parcelid ownername geom extras ZONING t geom zoningcode zoningdesc geom extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname 100% taxyear 100% updated geom · derived from geometry geom dem.us_1m · USGS 1m DEM 0.5% elevmin 0.5% elevmax 0.5% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 97.4% zonesubty 0.0% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 97.4% parcelid2 97.4% ogparcelid2 98.1% taxdistrict 98.2% usedesc 96.8% numbldgs 88.0% numunits 63.0% numfloors 88.4% imprvalue 88.4% landvalue 88.4% agvalue 97.3% totalvalue 98.2% taxacres 92.6% owneraddr 98.2% parceladdr 100% parcelstate 100% parcelzip 98.2% legaldesc 100% township 100% section 100% qtrsection 100% range 100% plssdesc 88.1% placefp 55.1% zoningurl 98.6% lbcsactivity 91.0% lbcsfunction 98.6% lbcstype 99.0% lbcscharacter 50.7% lbcsownership 97.4% sourceurl lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxyear taxdistrict usedesc zoningcode zoningdesc numbldgs numunits numfloors imprvalue landvalue agvalue totalvalue taxacres calcarea ownertype ownername owneraddr parceladdr parcelstate parcelzip legaldesc township section qtrsection range plssdesc firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg updated centroidx centroidy surfpointx surfpointy geom extras placefp zoningurl lbcsactivity lbcsfunction lbcstype lbcscharacter lbcsownership sourceurl publish.parcel_layer columns not fed by these sources (39) — empty or below 50% fill in this county parentid, stackid, taxacctnum, usecode, yearbuilt, bldgsqft, bedrooms, halfbaths, fullbaths, saleamt, saledate, ownercity, ownerstate, ownerzip parcelcity, book, page, block, lot, parceltype, accesstype, iucnclass, placename, placetype, fireplaces, heating, heatfuel, cooling, foundation roofcover, siding, bldgtype, naicscode, frsid, dfrurl, caapermit, cwapermit, rcrapermit, ownerlist PARCEL 3 mapped · 1 kept in extras · 51 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL pin owner geom parcelid ownername geom extras · 1 source columns preserved as json county extras not present in source — filled with NULL (51) parcelid2, taxacctnum, taxyear, usecode, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms halfbaths, fullbaths, imprvalue, landvalue, agvalue, totalvalue, taxacres, saleamt, saledate, owneraddr, ownercity, ownerstate, ownerzip parceladdr, parcelcity, parcelstate, parcelzip, legaldesc, township, section, qtrsection, range, plssdesc, book, page, block, lot, updated sourceurl, taxdistrict, parentid, heatfuel, fireplaces, heating, cooling, foundation, roofcover, siding ZONING 4 mapped · 4 transformed · 6 unmapped (NULL) SOURCE COLUMNS HARMONIZED → ZONING t geom zoningcode (row_to_json(t) ->> 'basezone')::text zoningdesc (row_to_json(t) ->> 'zoning')::text geom t.geom extras json_build_object('city', row_to_json(t) ->> 'city')::text not present in source — filled with NULL (6) zoningtype, ordinance, setbacks, restrictions, notes, sourceurl

Neighboring counties

Parcel data for counties bordering Ada County:

Frequently asked questions

Where can I find Ada County, ID parcel and GIS data?

Land Records publishes a Ada County, ID parcel dataset in which every parcel carries its boundary polygon (GIS geometry) along with ownership, assessed value, land use, acreage, and sale history. Preview it in the interactive explorer on this page, or download the full Ada County, ID dataset as a GeoPackage or CSV.

How many parcels are in Ada County, ID?

The current dataset contains 222,590 parcel records for Ada County, ID, each with its boundary geometry and assessor attributes.

What is the FIPS code for Ada County, ID?

The FIPS code for Ada County, ID is 16001.

What information does each Ada County, ID parcel record include?

Each Ada County, ID parcel record includes the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and the most recent sale price and date — plus the parcel boundary polygon. Per-attribute fill rates are listed in the coverage table on this page.

Is Ada County, ID parcel data free?

You can preview Ada County, ID parcels for free in the interactive explorer. The complete dataset is available as a one-time download or through the nationwide parcel web service; see the download options on this page for current pricing.

Does Ada County, ID have an official GIS or property records website?

Yes — the official Ada County, ID government website is linked in the county details above. Land Records standardizes Ada County, ID assessor and recorder records into a single nationwide parcel schema with GIS boundary geometry.

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated